Rainbow Electronics HT49R70A-1 - Manual

HT49R70A-1
8-Bit LCD Type OTP MCU
Rev. 1.00 1 December 4, 2001
Features
· Operating voltage: 3.0V~5.5V
· 8 input lines
· 16 bidirectional I/O lines
· Two external interrupt input
· One 8-bit and one 16-bit programmable timer/event
counter with PFD (programmable frequency divider)
function
· LCD driver with 41 ´3 or 40´4 segments
· 8K ´16 program memory EPROM
· 224 ´8 data memory RAM
· Real Time Clock (RTC)
· 8-bit prescaler for RTC
· Watchdog Timer
· Buzzer output
· On-chip crystal, RC and 32768Hz crystal oscillator
· HALT function and wake-up feature reduce power
consumption
· 8-level subroutine nesting
· Bit manipulation instruction
· 16-bit table read instruction
· Up to 0.5 ms instruction cycle with 8MHz system clock
· 63 powerful instructions
· All instructions in 1 or 2 machine cycles
· 100-pin QFP package
General Description
The HT49R70A-1 is an 8-bit high performance single
chip MCU. Its single cycle instruction and two-stage
pipeline architecture make it suitable for high speed ap-
plications. The device is also suitable for use in multiple LCD low power applications such as scales, leisure
products, high-level household appliances, hand held
LCD products, and battery operated systems in particu-
lar.